Nut-lock.



No; 660,594. Patented 0ct.'"30, I900.

- L. CWSHAMMO.

NUT LOCK.

(Applicahon filed June 6, 1900.)

(No Modal.)

Witmzooeo UNITED STATES PATENT OFFICE.

LUTHER C. SHAMMO, OF HARRISBURG, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 660,594, dated October30, 1900.

Application filed June 5 I900. oerial No. 19,135. (No model.)

To all whom it may concern.-

Be it known that I, LUTHER C. SHAMMO, a citizen of the United States,residing at Harrisburg, in the county of Dauphin, State of Pennsylvania,have invented a certain new and useful Improvement in Nut-Locks, ofwhich the following is a specification, reference being had to theaccompanying drawwas.

This improvement relates to that class of nutlocks in which anon-rotatable washer is used to supplement the nut and in which afastening device is provided to lock the nut to said non-rotatablewasher, and thereby prevent its becoming loose; and it is my object toprovide a nut-lock which while possessing all the advantages usuallypossessed by this class of nut-locks will obviate the necessity ofsprings or screws to hold together the two parts of the lock.

WVith this object in view my invention consists in the peculiarconstruction, arrangement, and combination of parts hereinafterdescribed, and definitely claimed.

In the accompanying drawings, Figure 1 is a perspective view of myimprovement. Fig. 2 is a longitudinal vertical section. Fig. 3 is asimilar section showing the manner of attachment of the locking-pin, andFig. 4: is a detail of the locking-pin.

Referring now to the details of the drawings by numerals, 1 representsthe bolt, having the usual head, shank, and screw-threaded end; butbetween the round part of the shank and said screw-threaded end Iprovide an eight-sided portion 2. On this octagonal portion 2 isslidingly attached a washer 3, having its central opening of the sameshape as said octagonal part 2, so that said washer may have only asliding motion lengthwise of the bolt and at the same time be incapableof rotary movement thereon. It is obvious that instead of making thebolt with eight sides it may be made with any desired number, or, ifpreferred, it may be provided with a feather or key to engage a groovein the non-rotatable washer 3. However, I prefer the octagonal shape, asthat is nearest the shape of the bolt. This nonrotatable washer isprovided with a plurality of adjusting holes or perforations 4, whoseuse will appear later.

. The numeral 5 represents the nut, which is secured by screw-threads tothe bolt 1 in the usual manner. This nut 5 is provided with a peculiaropening 6, which forms'a seat for a looking-pin 9, the opening 6comprising a shallow portion 7, with an undercut end 7 and a deep recess8. The locking-pin 9 is of the peculiar shape shown in Fig. 4 andcomprises a comparatively thin member 9 and a main part or body 9, thelatter having a lug 9, which is adapted to project into any one of theplurality of openings in the non-rotatable washer 3. The end 9 of thislocking-pin 9 is formed with a beveled end, as shown at 9, to fit intothe undercut end 7 of the recess 8, and the latter is provided with agroove or opening 8, by means of which a tool may be wedged under theflat portion 9* of the locking-pin 9 and the latter thus disengaged.

In operation the washer 3 is placed on the bolt and the nut 5 screwedhome in the usual manner, and when the latter is as tight as it can bemade and register with one of the perforations 4 the lug 9 of thelocking-pin is pushed through the deep recess 8 in the nut 5 and intothe perforation 4:, when the other end of the pin can then be forceddown into its seat, with its beveled end fitting under the undercut end7 of said recess. When it is desired to detach the nut, a suitable toolis used, the end of which is caused to enter the groove or opening 8 andwedged under the locking-pin, and the latter thus forced out of itsseat.

I am aware that it is old in quite a number of patents to usenon-rotatable washers in connection with a nut provided with a screw orpin to engage notches or recesses in the washerssuch, for example, asthose shown in United States Patents Nos. 283,505 and 523,605and do notattempt to claim anything shown therein.

What I claim as new is 1. The combination of a screw-threaded bolt and awasher slidingly secured thereto, the said bolt and washer being soshaped with respect to each other that the washerwill not rotate on thebolt, and the latter having a perforation therein; of a nut threaded onsaid bolt and having a recess in one of the sides thereof, and alocking-pin adapted to enter said recess and having a lug arranged toenter the perforation in the aforesaid washer, substantially asdescribed.

2. The combination with a screw-threaded bolt provided with anon-rotatable Washer slidingly secured thereto, the washer having aperforation therein; of a nut threaded on said bolt and having a recessin one of the sides thereof, a locking-pin adapted to enter said recessand having a lug arranged to enter the perforation in the aforesaidWasher, the end of the recess being undercut and the end of thelocking-pin shaped to engage with said undercut recess, substantially asdescribed. I

3. The combination with a screw-threaded bolt provided with anon-rotatable Washer slidingly secured thereto, the washer having aplurality of perforations therein; of 'a nut threaded on said bolt andhaving a recess in one of the sides thereof, a locking-pin adapted toenter said recess and having a lug arranged to enter any of theperforations in the aforesaid washer, the end of the recess beingundercut and the end of the locking-pin shaped to engage with saidundercut recess, and a groove or opening by which the pin may be wedgedoff, substantially as described.

In testimony whereof I affix my signature, in the presence of twowitnesses, this 31st day of May, 1900.

LUTHER o. SI-IAMMO.

Witnesses:

FREDERICK M. OTT, FORREST L. YODER.

